Weight-motor



(No Model.) 4 Sheet-Sheet 1.

No. 494,693. Patented Apr 4,1893.

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(No Model.) .4 Sheets-Sheet 2.

0. E. 1-1103,- L. MQDONALD & J. D. McDOWELL. WEIGHT MOTOR.

No. 494,693. 7 Patented Apr. 4, 1893.

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(No Model.) 4 SheetsSheet 3.

9. E; RICE, L. B McDONALD &- J. D..M0'DOWELL'.

WEIGHT MOTOR.

No. 494,693. Patented Apr. 4, 1893.

(No Model.) 4 Sheets- -Sheet 4.

G. E. RICE, L. B. McDONALD & J. D. MQ'DOWELL. WEIGHT MOTOR.

No. 494,693. I Patented'Apr. 4, 1893.

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UNIT D STATES PATENT OFFICE.

CHARLES E. RICE, LEWIS B. MCDONALD, AND JAMES D. MCDOWELL, OF LITTLEROCK, ARKANSAS.

WEIGHT-MOTOR.

SPECIFICATION forming part of Letters Patent No. 494,693, dated April 4,1893.

Application filed May 25,

T aZZ whom it may concern.-

Be it known that we, CHARLES E. RICE, LEWIS B. MCDONALD, and JAMES D.McDow- ELL, of Little Rock, Arkansas, have jointly made a new and usefulImprovement in Weight-Motor, of which the following is a full, clear,and exact description.

The novelty in the present invention consists in the means and mechanismand in the construct-ion and combination of the parts as set forth andclaimed.

The most desirable mode of carrying out the improvement is exhibited inthe annexed drawings, making part of this specification,

in which Figure 1 is a side elevation (a portion of the frame-workbroken away) of the improved apparatus; Fig. 2 a vertical section on theline 2-2 of Fig. 1; Fig. 3 a vertical section upon the line 3-3 of Fig.2; Fig; 4 a plan of the parts shown in Fig. 3; Fig. 5 a plan of theportion (the right hand portion as shown in Fig. 1) of the apparatuscontaining the capstan; Fig. 6 a side elevation of the eccentricgearing, the parts being as when the pump-rod is moved downward; Fig. 7a similar view of the eccentric gearing, the parts being as on theup-stroke of the pump-rod;

and Fig. 8 a plan of the parts of Fig. 6. The

last six named views are upon an enlarged scale.

The same letters of reference denote the same parts.

The frame-work of the apparatus is usually, and mainly, in the form of atower, A, substantially as shown. The weight, B, which may be of anypreferred form and nature, is attached to a rope or other suitable tie,C, which is carried over an overhead or upper bearing, such as thesheave D, arranged at a suitable elevation in the tower, and thence to apart such as the drum, E, upon which the rope is adapted to be wound.The drum is attached to a shaft, e, journaled at e,'e, and it alsocarries, or is extended to form, another drum, E, preferably of largerdiameter than that of the drum E, upon which another rope F, is adaptedto be wound. The last named rope leads from the drum, E, to a capstan G.To suit the relative arrangement of said drum and capstan anintermediate bearing, H, for

1892. Serial No. 434,332. (No model.)

E, and'wound upon the capstan, and the other rope C, isthereby woundupon its drumE, and the weight elevated to thedesired level. \rVe desirenot to be restricted to the means described, or any particular means,'for rais-- ing the weight: neither to any 'special arrangementorconstruction of drumor other part upon which the weight-rope is wound,

.and whereby the power of the weight is stored to be used at will. We,however, prefer the means exhibited.

Under some circumstances the described weight-power can be taken ofifrom the pulley, drum, shaft, or other part upon which the rope iswound, quite directly, but, to more fully carryout the improvement, andto multiply the motion of the shaft e, the following arrangement ispreferably adopted. Said shaft, 9, is provided with a gear, I; this gearengages with a pinion J attached to a shaftj, that isjournaled inbearings j",j, and provided with a gear J; said last named gear in turnengages with a pinion K, upon ashaft, k, that is journaled in bearingsk, It, all substantiallyasshown. Theshaftk,isthusdriveu from the shaft,e, and at a much higher rate than that of the shaft 6. Its rate,however, is substantially uniform .as long as the weight isdescending,-but its motion, in turn, is communicated to produce avariable rotary motion in another shaft Z, journaled at Z, Z, and,preferably as follows: two gear wheels K and L, are hung eccentricallyupon their respective shafts k and Z, and engage with. each othersubstantially as shown; the shaft Z is thus driven by the shank k, andat every revolution thereof it is driven part way round, say, half Wayround, more rapidly and the remainder of the revolution less rapidly,and the leverage increased during the slower movement and lessenedduring the. quicker movement. The gear wheels are preferablycircnlar,'although gear wheels hung eccentricallyand combined asdescribed, but of a'difthe crank M, connected directly with thepump-rod, N, of the pump, and it might be termed the pump-rod shaft. Thepump itself is not shown. It is of any of the customary forms adapted tobe driven by a reciprocating motion.

The relative arrangement of the wheels K, L, is shown more distinctly inFigs. 6 and 7. In Fig. 6 the pump-rod is supposed to be making itsdown-stroke, and the driven shaft, Z, is moving at its maximum rate, andthe driving shaft his exerting its least power. But as the pump issupposed to be a single acting oneit is only necessary to lower thepump-rod and pump-plunger, and for this work but little,if any, power isneeded, and the sooner the pump-plunger or bucket is brought intoposition to act the better. In Fig. '7, the pumprod is supposed to be onits up-stroke, and the driven shaft is moving atits slowest rate, andthe driving shaft is exerting its maximum power, which is desirable inview of the fact that the load is now being lifted. Thus, at eachrevolution of the driving shaft, its power increases with the work to beperformed, and diminishes as the load is lightened. An importantfeature, however of this portion of the mechanism is the means forregulating the described motion of the eccentric gearing.

0 represents what might be termed a counterbalance, preferably in theform of a weighted arm fastened to the shaft Z, and projecting therefromin the opposite direction to that of the crank M: it serves to balancethe pumprod both in its upward and in its downward movement, at least toan extent sufficient to.

prevent the rate of the motion of the parts from changing too abruptly.The weight 0 is adjustable upon the arm 0 toward and from,

the shaft Z.

arm 17, secured to the shaft to rotate therewith. At one of its ends,and preferably at its ends respectively, it is provided with vanes 11'and p which are adapted as the rotation of the shaft 70 is accelerated,to open or turn more flatwise and thus offer more resistance to therotation of the shaft, and, on the other hand, when the shaft motion isslackened, to turn more edgewise and offer less resistance. To this endthe vanes are each jointed at the inner end,p thereof to the arm 13 toenable the vanes to turn thereon as indicated by the positions of thevanes shown in the full and in the broken lines in Fig. 3, and, at apoint between the inner and outer end of the vane, are elasticallyconnected with the arm by means of the spring 19, substantially asshown. That is, the spring yields when the shaft motion is accelerated,allowing the vane to open, and, when the shaft motion is checked, thespring acts to turn the vane into its full-line position. weighted, asat 12 12 The arm, may be To enable the weight to be wound up withoutworking the pump-rod and the parts more immediately therewith connected,the shaft 3' and gear J are adapted to be connected by means of apaWl-and-ratchet mechanism Q, which acts to unite the gear and shaft toturn together only when the weight is running down.

In operation, the weight, in the manner indicated, is elevated to thepreferred height and there upheld until it is desired to operate thepump. Whatever has been applied to the capstan for rotating it inefiecting the elevation of the weight is suitably disconnected therefromto leave the capstan and drums free to turn whenever the weight isallowed to drop. Any suitable means, (not shown) may be employed tosecure the weight in its tip-position, and to freeit when it is to bedropped, and for braking the weight in its descent. 0n releasing theweight its rope acts to effect the rotation of the drums and the variousshafts and gears in the direction indicated by the arrows at, Fig. l,and the pn m p-rod and pump are accordingly operated. After its power isexhausted the weight is again elevated, and the operation is repeated.

We desire not to be restricted to a pump in the use of thehereindescribed mechanism. That is, the rod M might be any reciprocatingpart. Nor do we wish to be limited to the eccentric gearing fortransmitting the drum-shaft motion, derived from the falling weight, tothe pump-rod.

We claim- 1. In a pumping mechanism, in combination with a primary trainof gearing, an cecentricgear engaging the last wheel of the train,another eccentric gear engaging that first mentioned, a crank on theshaft of the last-referred-to eccentric gear, and a counterbalancebetween the crank and said last gear.

2. In a pumping mechanism, in combination with a primary train ofgearing, an eccentric gear engaging the last gear of the train, anothereccentric gear engaging that first mentioned, stationary bearings forthe shafts of said eccentric gears, a crank'on the shaft of thelast-referred-to eccentric gear, an adjustable counterbalance betweenthe crank and said last gear, said eccentric gears being so arranged asto allow a rapid downward movement and to cause a slow and powerfulupward movement, substantially as set forth.

3. The governor consisting of the weighted arm, and theeccentrically-held pivoted vanes, substantially as described.

8\Vitness our hands this 20th day of May, 1 92.

CHARLES E. RICE. LEWIS B. MCDONALD. JAMES D. MODOVVELL. \Vitnesses:

RICHARD CHARLES MCDONALD, G. W. SHINN.

IIO

